B2B Email & Domain Scorer API
Not rated yet · Be the first to rate itEmail verification: MX, disposable/free/role detection, typo fix and a keep/fix/drop action.
B2B Email & Domain Scorer API is a free Email API that requires apiKey authentication, is served over HTTPS and has unconfirmed CORS support.
- Authentication
- apiKey
- HTTPS
- Yes
- CORS
- Unknown
- Category
- Uptime (30 days)
- 100%
Online · 1230 msTested Nov 15, 2026 · checked dailyIs it down? Status & uptime
Key facts
- 100% uptime (30 days)
- HTTPS

Validate emails before they bounce
mailboxlayer checks syntax, MX records and SMTP, and flags disposable addresses, with a free plan to start.
B2B Email & Domain Scorer API alternatives
Compare all 46 alternatives →ContactLint
Validate email syntax, MX, disposable and role addresses with typo suggestions, plus phone numbers
mailfloss
Stop spam signups: block disposable and invalid emails and suggest typo fixes. 500 free a month
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B2B Email & Domain Scorer API FAQ
Is the B2B Email & Domain Scorer API free?
Yes. The B2B Email & Domain Scorer API is listed in the Email category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
Does the B2B Email & Domain Scorer API require an API key?
Yes. The B2B Email & Domain Scorer API uses apiKey authentication, so you need to register for credentials before making requests.
Can I call the B2B Email & Domain Scorer API from the browser?
CORS support for the B2B Email & Domain Scorer API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Does the B2B Email & Domain Scorer API support HTTPS?
Yes. The B2B Email & Domain Scorer API is served over HTTPS, so it's safe to use in production.
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